1）wget ftp://ftp.ncbi.nlm.nih.gov/blast/executables/blast+/2.8.0alpha/ncbi-blast-2.8.0-alpha+-x64-linux.tar.gz
2）tar -zxvf ncbi-blast-2.2.30+-x64-linux.tar.gz
3）mv ncbi-blast-2.8.0+/ blast
4）echo 'PATH=/home/jxdong/biosoft/blast/bin:$PATH' >> ~/.bashrc
5) source ~/.bashrc